Fabrizio Grandoni

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ÐThis paper presents a class of count-and-threshold mechanisms, collectively named-count, which are able to discriminate between transient faults and intermittent faults in computing systems. For many years, commercial systems have been using transient fault discrimination via threshold-based techniques. We aim to contribute to the utility of(More)
In this paper the consolidate identification of faults, distinguished as transient or perma-nent/intermittent, is approached. Transient faults discrimination has long been performed in commercial systems: threshold-based techniques have been practiced for several years for this purpose. The present work aims to contribute to the usefulness of the(More)
use of the material in this paper is permitted. However, permission to reprint or republish this material for advertising or promotional purposes or for creating new works for resale or redistribution, or to reuse any copyrighted component of this work in other works must be obtained from the authors of this paper. Abstract Mechanisms for restoring the(More)
This paper deals with multiprocessor systems required to provide both high performance and good figures of dependability attributes. Fault tolerance is pursued through a proper combination and integration of a diagnostic mechanism, called α-count, with simple instances of redundancy-based error processing structures. The resulting fault tolerance strategies(More)
The structure of the Processing Element (PE), which is the basic component of SMA<supscrpt>1</supscrpt>, is presented. The PE consists of a simple serial arithmetic unit, a local high speed data memory, serial input and output ports, serial communication channels with neighbouring PE's, and some local control logic. The PE array operates under the control(More)
In designing high assurance systems, the dependability goals are achieved through the adoption of several fault tolerance techniques. Unfortunately, their combined effect on the system cannot be, in the general case, derived by straightforward composition of the stand-alone component's analysis, because of mutual dependence of their controlling parameters.(More)
Effective discrimination between transient and permanent faults is a very important practical problem in (dependable) system design. A count-and-threshold mechanism named α-count, designed to discriminate between transient faults and intermittent faults in computing systems, is presented in an enhanced embodiment. It retains enough simplicity to allow(More)
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